Publish VM receiving authority atomically

TE
3h ago
+1284-101

Publish authenticated VM receiver keys, policy and issuer time together while retaining replay history. Refreshes are fenced to their owner and intent: late replies or failures cannot reopen or clear newer authority. A bounded client validates the protected agent socket and original public VM identity.

Hosted Linux passes 102 receiver cases, fmt/Clippy and Rust 1.91; macOS is queued. Baseline reproduced four failures. Supervised listener and private key bootstrap remain follow-ups.

Changelog

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